[PATCH 3/4] hvc_console: free_irq only if request_irq was successful

[Christian Borntraeger]

Am Donnerstag, 8. Januar 2009 schrieb Milton Miller:
> Only call free_irq if we marked the request_irq has having succeeded
> instead of whenever the the sub-driver identified the interrupt to use.
> 
> Signed-off-by: Milton Miller <miltonm at bga.com>
> ---
> Appears to be a bugfix but might use a bit of time in -next.
> This code was created in 2.6.28 to allow s390 to build without adding 
ifdefs.
> Many hvc-console sub-drivers have a single channel and are not modules.
> 
> Index: work.git/drivers/char/hvc_irq.c
> ===================================================================
> --- work.git.orig/drivers/char/hvc_irq.c	2009-01-08 04:07:28.000000000 -0600
> +++ work.git/drivers/char/hvc_irq.c	2009-01-08 04:07:47.000000000 -0600
> @@ -37,7 +37,7 @@ int notifier_add_irq(struct hvc_struct *
> 
>  void notifier_del_irq(struct hvc_struct *hp, int irq)
>  {
> -	if (!irq)
> +	if (!hp->irq_requested)
>  		return;
>  	free_irq(irq, hp);
>  	hp->irq_requested = 0;
> 

Looks sane.

Acked-by: Christian Borntraeger <borntraeger at de.ibm.com>